On the site page I have the plugin, I get the error: "East Appointments - Settings validation: You need to define at least one location. You need to define at least one service. You need to define at least one worker. There should be at least one Connection." I read a thread that said to edit 'is working' to yes, so I went in to check if that was the problem and noticed that all the definitions I'd added when I set the plugin up are simply gone.  Not only that, but I recreated them and they promptly disappeared again.  Any idea what's wrong with the plugin?  Updated WP version, Windows 7, Firefox